FIGURE 1.
Titer distribution of antibodies against H3N2 (A) and H1N1 (B) at baseline and follow ups
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.